Centrifugal separator.



' ugal machines.

UNITED STATES Patented January 1'7, 1905. j

PATENT QEFICE.

CARL .Ij PIHD, OE CAMBRIDeERORT, MASSACHUSETTS,v AssICNOR'TO UNITED STATES DAIRY MANUFACTURING AND MACHINE COM- RANY, OE KITTERY, MAINE, A CORPORATION OE MAINE.v

CENTRIFUGAL SEPARATOR.

' SPECIFICATION forming part of Len-.ers Patent No.'7so,444, dated January 17, 1905- v Applicationled Tniy 8, 1901l Renewed June l23, 1904. Serial No. 213,821.

v To @ZZ whom, t may concern.-

Beit known that I, CARL J. PIHD, a citizen of the United States, residing at Cambridgeport, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Centrifugal Separators, of

vwhich the following is a specification.

My invention relates to Certain new and useful improvements in that class of devices g `commonly known as centrifugal separators ing a centrifugal of modiiied construction'.

Fig. 4 is a horizontalsectional view of Fig. 3 on the line yy. Figs. 5, 6, and 7 show modified forms of the inner vessel.

In the said drawings Figs. 1 and 2 the cylindrical bowl A is of the usual or any wellknown and appropriate construction. It is supported upo'n a vertical shaft B, which is to be rotated'at high speed by any of the methods usually employed for the purpose or by any mechanism which will give to the bowl the highly-rapid motion necessary to effect the separation of liquids in these centrif- Surmounting the bowl is the cover C, which, as shown, has a cone shape,

with a iange @depending from and surroundfresh milk--is poured, after which the milknamely, lying parallel with'and close to the v inner inclined wall of the conical portion of the cover-fhaving its inlet end near the top of the vertical wall of the bowl and its outlet end discharging laterally through the `neck portion of the cover.

` The feed-tube E lies vertically at the axis of the bowl and extends downward from the feed-inlet to a point near the bottom of the bowl, where it is connected to or formed with a cone-shaped `plate F, having a `horizontal flange bounding its outer edge, and the bottom of the bowl'is formed with a centrallydisposed cone Gr, entering the coneshaped plate F, but separated from the latter to form the downwardly-diverging passages H, from which lateral branches I lead horizontally Outwardly toward the inner sides of the bowl, whereby the whole or fresh milk is delivered from the feed-tube to said bowl in horizontal planes. On the bottom of the cone-shaped plate F are formed or secured wings K, which operate in the divergent passages H and the horizontal branches I thereof and tend to throw the fresh milk outwardly into the bowl by the centrifugal force exerted by the ma'- chine. The outer edge of the cone-shaped plate F is iixed to the lower edge orl bottom of a drum L, whose Walls and. entire surface are imperforate and whose upper end is coneshaped, the outer walls of this latter portion being inclined or convex and connecting the vertical walls of the drum with the outer walls of the feed-tube, andthe walls of this upper cone portion of the drum are separated from the walls of the cover to form the upper sepaf rating-passage. The vertical outer walls of the drum are parallel with and relatively c'lose to the wall of the bowl, wherebya narrow vertical passage is formed between the solid irnperforate walls of the bowl and drum through which the milk will flow in a comparatively thin sheet or layer, and as the separation of the cream from the blue milk occurs the cream follows the Wall of the drum and the blue milk follows the wall of the bowl, the separated products working upwardly in this position and the cream being delivered through the cream-outlet Z and the blue milk being delivered through the tube or passage e, placed to receive it. It will also be observed that the cone-shaped'upper portion of the drum is provided with radial wings N, the spaces between which are V-shaped in horizontal section and which in vertical section increase in depth from the lower points near the junction of the convex walls with the vertical walls of the bowl to the central portion of said wings and then decrease in depth from this central point toward the feed-tube. The periphery of the drum is also provided with radial wings O, which are parallel with the walls of the bowl and drum and whose outer edges operate against or close to the walls of the bowl. It will thus be apparent that the whole or fresh milk will be delivered through the feedtube and will be discharged into the bottom of the bowl and will thence be caused to iiow upwardly in a narrow stream or thin sheet between the solid or imperforate walls of the drum and bowl and be discharged as separated products, the cream emerging through one outlet and the blue milk through another outlet.

In Fig. 3 the construction is like what is shown in Fig. I, except that the disk F/ on the lower end of the feed-tube is a plain fiat disk instead of being cone-shaped, and the upper ends of the radial wings O have their outer edges curving toward and merging into the convex walls of the top of the drum. The feed-tube E' in Fig. 3 is also shown as having a wire c spirally wrapped aboutits interior to form a spiral passage which facilitates the iniiow of fresh milk.

In Figs. 1 to 4 the drums are shown as hollow, and to strengthen them I may use the internal diaphragms g, as shown in Fig. 3, and to assist in holding the wings on the drum in proper relative position I may also use lugs /z on the bowl fitting the wings. I do not, however, limit my invention to hollowv drums, as solid drums may be used, if desired, and such solid drums may be of any desired form in cross-section. They may be hexagonal, as in Fig. 5, octagonal, as in Fig. 6, or polygonal, as in Fig. 7, or otherwise shaped in cross-section; but in any event their walls are imperforate, and the liquid iiows in a thin sheet between said walls and the wall of the bowl. In either instance the liquid will start in its upward course from the bottom of the bowl,

and the cream will follow the in'iperforate wall of the drum in a straight upward direction without penetrating other surfaces ordescribing a circuitous course and will be held by this wall and delivered upwardly in a thin sheet separated from the lamina of blue milk and be finally discharged separated from the blue milk.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, *is* l. In a centrifugal separator the combination of a rotatable bowl, an imperforate wall proximate to the inner wall of the bowl and separated therefrom to form a narrow uninterrupted vertical passage in the field of greatest centrifugal force, through which passage the liquid iiows in a thin sheet-like form whereby the particles are required to travel but a short radial distance in separating, a feed-inlet, and separate outlets for separated constituents.

2. In a centrifugal separator, the combination of a rotatable bowl, an inner wall proximate to the wall of the bowl and separated therefrom to form a narrow uninterrupted Vertical passage in the iield of greatest centrifugal force, through which passage the liquid flows in an uninterrupted stream of slight radial depth whereby the particles are required to travel but a short distance horizontally to separate, a central feed-inlet, vertical wiiigs between the seiiarating-walls, and separate outlets for separated constituents.

` 3. Inacentrifugalliquid-separator,thecoinbination of a bowl, an inner body having iinperforate walls and having radial wings hetween it and the wall of the bowl, and separated from the latter to form a narrow passage through which the liquid liows in a thin sheet-like form, a feed-tube passing centrally through said body, wings between the bottom of the said body and the bottom wall of the bowl, and separate outlets for the separated CARL J. Pl l lL.

Vlitn esses:

WILLIAM Aeon, Looms A. BaowN.

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